#include<iostream>
using namespace std;
int steps(int n) {
    int count = 0;
    while (n != 1) {
        if (n % 2 == 0) {
            n /= 2;
        } else {
            n = (3 * n + 1) / 2;
        }
        count++;
    }
    return count;
}
int main(){
	int T;
	while(cin>>T&&T!=0){
		
		cout<<steps(T)<<endl;
	}
	return 0;
}